it seems that my tire on right side is wearing on inside and outside why.
If your tire is wearing on both the inside and outside the first thing you want to check is the tire pressure. An under-inflated tire will increase the contact patch (surface area of the tire) that touches the ground. This will cause the outside and inside tires to wear at a higher rate. If your tire is over-inflated then the middle part of your tire will wear out faster than the outside. These are the common tire wear issues.
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